They give justifications for removing the first two, but not the third.
Assuming by "subscription UI" they mean the support for following a link to an RSS feed and being given the option to send the URL to my preferred online feed reader, I think that's a great shame.
Making it worse, that article says "that improved replacements for those features are available via add-ons", with a link to what they say is a curated collection of readers, but none of the add-ons in that collection seem to replace the old subscription UI.
It's a silly justification anyway, as far as "feed previews" go: you preview a feed when you're thinking of subscribing to it, which isn't expected to be an everyday sort of action.
I hope they wouldn't consider removing the option to select which application to use to open a particular file type, or to install an add-on, based on the percentage of sessions which use it.
I'm guessing that their numbers come from people who don't switch off their telemetry. So even if you use RSS, if you don't let them know it, you won't be counted. They're not mind-readers.
- the built-in feed preview feature
- the "live bookmarks" support
- the subscription UI
They give justifications for removing the first two, but not the third.
Assuming by "subscription UI" they mean the support for following a link to an RSS feed and being given the option to send the URL to my preferred online feed reader, I think that's a great shame.
Making it worse, that article says "that improved replacements for those features are available via add-ons", with a link to what they say is a curated collection of readers, but none of the add-ons in that collection seem to replace the old subscription UI.